package com.java.key;

	import java.io.BufferedReader;
	import java.io.IOException;
	import java.io.InputStreamReader;
	import java.text.DecimalFormat;
	import java.text.NumberFormat;
	import java.text.SimpleDateFormat;
	import java.util.Calendar;

	public class MyEclipseSKeyGen86 {
	 private static final String LL = "Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself.";

	 public String getSerial(String userId, String type) {
	  NumberFormat nf = new DecimalFormat("000");
	  Calendar cal = Calendar.getInstance();
	  cal.add(Calendar.YEAR, 3);
	  cal.add(Calendar.DAY_OF_YEAR, -1);
	  String licenseNum = nf.format((int) (Math.random() * 1000));
	  String expTime = new StringBuilder("-").append(
	    new SimpleDateFormat("yyMMdd").format(cal.getTime())).append(
	    "0").toString();
	  String need = new StringBuilder(userId.substring(0, 1)).append("Y")
	    .append(type).append("-100").append(licenseNum).append(expTime)
	    .toString();
	  String dx = new StringBuilder(need).append(LL).append(userId)
	    .toString();
	  int suf = this.decode(dx);
	  String code = new StringBuilder(need).append(String.valueOf(suf))
	    .toString();
	  return this.change(code);
	 }

	 private int decode(String s) {
	  int i;
	  char[] ac;
	  int j;
	  int k;
	  i = 0;
	  ac = s.toCharArray();
	  j = 0;
	  k = ac.length;
	  while (j < k) {
	   i = (31 * i) + ac[j];
	   j++;
	  }
	  return Math.abs(i);
	 }

	 private String change(String s) {
	  byte[] abyte0;
	  char[] ac;
	  int i;
	  int k;
	  int j;
	  abyte0 = s.getBytes();
	  ac = new char[s.length()];
	  i = 0;
	  k = abyte0.length;
	  while (i < k) {
	   j = abyte0[i];
	   if ((j >= 48) && (j <= 57)) {
	    j = (((j - 48) + 5) % 10) + 48;
	   } else if ((j >= 65) && (j <= 90)) {
	    j = (((j - 65) + 13) % 26) + 65;
	   } else if ((j >= 97) && (j <= 122)) {
	    j = (((j - 97) + 13) % 26) + 97;
	   }
	   ac[i] = (char) j;
	   i++;
	  }
	  return String.valueOf(ac);
	 }

	 public static void main(String[] args) {
	  try {
	   System.out.println("please input register name:");
	   BufferedReader reader = new BufferedReader(new InputStreamReader(
	     System.in));
	   String userId = null;
	   userId = reader.readLine();
	   if (userId == null || "".equals(userId)) {
	    System.out.println("name is null");
	    System.exit(0);
	   }
	   MyEclipseSKeyGen86 myeclipsegen = new MyEclipseSKeyGen86();
	   String res = myeclipsegen.getSerial(userId, "E3MS");
	   System.out.println("Serial:" + res);
	   reader.readLine();
	  } catch (IOException ex) {
	   ex.printStackTrace();
	  }
	 }
	}
